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please read and understand the following Detroit document.On page 3 it states:For Extended Life Coolants (ELC)All ELCs used must also meet Detroit 93K217 specification. Detroitâ„¢ requires that these types of coolants to be free of nitrite and phosphate. Detroitâ„¢ has found that ELCs containing nitrite may lead to a breakdown of the coolant andsubsequent damage to the cooling system.It also states on page 3:For Standard Life Coolants (SLC)Standard Life Coolant (SLC) contains inhibitor salts, including nitrites, to prevent liner cavitation.